Secondary battery of excellent sealability

a technology of sealability and secondary batteries, applied in the direction of cell components, flat cell grouping, sustainable manufacturing/processing, etc., can solve the problems of accelerating the reduction of reducing the service life of the battery, etc., to reduce the movement of increase the surface area, and reduce the effect of the movement of the moisture or the electroly
US20060216594A1Active Publication Date: 2006-09-28LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Publication Date
2006-09-28

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Abstract

Disclosed herein is a secondary battery comprising electrode leads mounted in a sealed fashion in a battery case while the electrode leads partially protrude from the battery case and resin films disposed between the battery case and the electrode leads wherein the electrode leads are provided at predetermined areas of the surfaces thereof, to which the resin films are applied, with irregular parts, by which the adhesive strength between the electrode leads and the resin films is increased. The adhesive strength between the electrode leads and the resin films is large, and the movement path of moisture or electrolyte, through which the moisture contained in the air or the electrolyte contained in the secondary battery may move, is extended. Consequently, the present invention has the effect of minimizing the reduction in service life of the secondary battery due to introduction of the moisture into the secondary battery and leakage of the electrolyte from the secondary battery. The secondary battery is very useful as a unit cell for medium- or large-sized battery systems, such as hybrid electric vehicles.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to a secondary battery with excellent sealability, more particularly, to a high-output, large-capacity secondary battery having minute irregular parts formed at predetermined areas of the surfaces of electrode leads, to which resin films are applied, such that the adhesive strength between the electrode leads and the resin films, which are disposed between the electrode leads and a battery case, is improved, whereby introduction of moisture contained in the air into the secondary battery and leakage of an electrolyte from the secondary battery are effectively prevented, and therefore, the service life of the secondary battery is increased. BACKGROUND OF THE INVENTION

[0002] Recently, a secondary battery, which can be charged and discharged, has been widely used as an energy source for wireless mobile devices. Also, the secondary battery has attracted considerable attention as a power source for electric vehicles and hybrid ...

Claims

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